Reversing rolling-mill.



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REVERSING 'RLLING MILL.

(Application Sled Oct. 22, 1900.|

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(Np Model.)

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No. 669,242. Patented. Mar. v5, 190i. J. G. HODGSON.

REVEBSING BULLING MILL.

(Application tiled Oct. 22. 1900.. v (No Model.) 4 Sheets-,Sheet 2..

'FEED AND BDISCMA FEED oms( fe; A TTORNEY",

No. 669,242. Patented Mar. 5, 19m. ..1. G. Hansson.

R'EVERSING ROLLING MILL.

(Application led Oct. 22 1900A .(Ho Model.)

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INVENTOR.

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Patented Mar. 5, 190|.

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.IOIIN G. IIODGSON, OF MAYWOOD, ILLINOIS, ASSIGNOR TO NORTON BROTHERS,OF CHICAGO, ILLINOIS.

REVERSING ROLLING-MILL.

SPECIFICATION forming part of Letters Patent No. 669,242, dated March 5,1901. Application led October 22, 1900. Serial No. 33,965.. LNo model.)

To all whom, it may concern.-

Be it known that I, JOHN G. HoDesoN, a citizen of the United States,residing in Maywood, in the county of Cook and State of Illinois, haveinvented a new and useful Improvement in Reversing Rolling Mills, ofwhich the following is a specification.

This invention relates to reversing rollingmills for rolling metal bars,sheets, or packs of sheets.

The object of this invention is to provide a reversing metal sheet,plate, or bar rolling mill of a strong, simple, elicient, and durableconstruction, by means of which metal bars, plates, sheets, or packs ofsheets may be rapidly and successively passed back `and forth betweenthe rolls and in which the feed-screws, by which the rolls are set oradjusted closer together as the rolling proceeds, maybe operated eitherby hand or automatically at each reversal of the mill and by diminishingiucrements after each successive pass, as may be required, and by meansof which the feedscrews may at the same time be positively andaccurately adjusted and rigidly and unyieldingly held in adjustment.

The invention consists in the means or mechanism employed forpractically accomplishing this object or result-that is to say, itcomprises in a reversing rolling-mill in cooperative combination withthe reversingrolls friction-clutches and a hydraulic ram for operatingthe same to reverse the rolls, a reversing valve and valve-lever forsaid ram, feed-screws for setting or adjusting the rolls closer andcloser together, as required, worms and worm-gears for turning thefeed-screws by hand, a rack and gears for turning or adjusting thefeed-screws automatically, a hydraulic cylinder and piston for operatingthe rack, a starting-valve t'or said feedscrewop erating ram operated bya low or city-water pressure cylinder and piston connected to thereversing valve-lever, a stopping-valve for said feed-screw ramautomatically operated by a notched register or controlling barconnected to the piston of said ram, the notches in which register orcontrolling bar are differently spaced to give the required ordiminishing increments of motion to the t`eedscrews at successivepasses, the feed-screw ram having also two further valves for returningits piston and the feed-screw rack and notched bar connected thereto toposition by a single continuous movement after each complete rollingoperation.

The invention also consists in the novel construction of parts anddevices and in the novel combination of parts and devices herein shownand described, and specied in the claims.

In the accompanying drawings, forming a part of this specification,Figure l is a front elevation of a reversing rolling-mill embodying myinvention, and Fig. 2 is a detail planv showing in diagram the valve andhydraulic pipe system. In these views the reversing feed-tables whichare geared or connected to the driven roll by any suitable gearing orconnecting mechanism, so as to be reversed with the rolls, are omittedfor sake of clearness of illustration. Fig. 3 is an enlarged-detail planview of the valvetable,`and Fig. 4 a side elevation of the same.

In the drawings, 8 represents the frame of the machine or mill; 9, theupper roll; lO, the lower or driven roll; ll, its shaft; l2 and 13,friction-clutches for reversing the rotation of the rolls through anysuitable gearing or mechanism; 14 and l5, the hydraulic ram whichoperates the friction-clutches alternately through the connecting-lever16.

17 is the reversing-valve, connected by the pipes 1S 19 with theclutch-ram I5, and 20 is t-he friction-clutch valve-lever, by movementot' which lever the operator reverses the rota tion of the rolls asrequired.

2l 22 are the feed or housing screws, by which the rolls 9 l0 are adjListed closet' together 0r farther apart, as required. These feed-screwsmay each be turned or adjusted by hand through the worm 23 and worm-gear24, with which each is provided for this purpose. They may also beturned or adjusted automatically by means of the gears 25 25 and therack 26, which meshes with said gears. The worms 23 23 are mounted onthe gears 24 24, so that neither means of turning or adjusting thefeed-screws interferes with the other. The rack 26 is connected to thepiston- IOO Avalve 29 has a Valve-lever 33, which is furnished with aweight 34, and is operated so as to be momentarily opened by a slidingcam or bar 35, which engages a roller 36, adjustably mounted on thestarting-valve lever through the adjusting-screw 37. The cambar isconnected to the piston-stem 38 of a low or city pressure cylinder 39,the valve of which is connected by a valve-lever4l with the reversingvalve-lever 20 through a detachable link.42, so that the starting-valveof the feed-screw ram may be connected with the reversing valve-lever ornot, according as it is 0r is not desired to operate the feedscrewsautomatically at each reversal of the mill through the feed-screw ramand the connecting-rack 2h' and gears 25 25.

The stopping-valve 31 of the feed-screw ram 28 has a valve-lever 43,furnished with a roller 44 and a weight 45, and is operated by a notchedregister or controlling bar 46,Which 'is secured to the piston-stem 27of the t'eedscrew ram, so as to he reciprocated thereby. The notches 47in the register or controlling bar 46 are at varying distances apart,being closer together at the right-hand end ofthe bar titan at theleft-hand end thereof, so that the feed-screw-operating rack 26 will bemoved bydintinishing increments at each successive reversal of the rollsas the rolling proceeds. The notched controlling-bar 46 is removablyconnected to the piston-stem 27 or rack 26 by a pin 4S, so that bysimply removing one notched bar and replacing it with another having itsnotches differently spaced any required degree or extent of movement maybe automatically given to the feed-screws as may be required.

'lhe feed-screw ram 23 has a combined feed and exhaust or two-Way valve49, connected by a pipe 50 with its forward or right-- hand end, and afeed-valve 5l, connected by a pipe 52 with the rear or left-hand end ofthe feed-screw ram 28. The operating-levers 53 54 of the valves 49 5lare connected together by a link 55, so that they are operatedsimultaneously.

56 is the city or low-pressure water pipe leading to the valve 40 of thelow-pressure cylinder 39, by which the starting-valve is operated, and57 is the pipe leading` to the accumulator or hydraulic pump, from whichwater under pressure is supplied to the hydraulic rams as requiredthrough their operating-valves.

The operation is as follows: When the detachable link 42, connecting thereversing valve-lever 2O and the lever 4l, through which thestarting-val ve of the feed-screw ram is operated, is disconnected, themill is reversed by the operator moving the reversing-lever 20, whichreleases one friction-clutch and operates the other through theclutch-rain l5. \Vhen thus operated, the feed-screws remain unchanged orunmoved through successive passes and are turned or adjusted as may berequired by hand through the worms and worm-gears- 23 24. When, on theother hand, the levers 20 and 4l are connected together by thedetachable link 42, the low-pressure-cylinder valve 40 is operated, thuscausing the starting-valve 2l) to be momentarily openetlthat is to say,while the cam o1' projection 35 is passing under the roller 3601i thestartingvalve lever 33, the starting-valve lever being closed very soonafter it is opened. During the short interval the startingvalve 29 isopen the wateror other liquid under pressure may flow ont from the rearor left-hand end of the feed screw ram cylinder 28 through therelief-pipe 30, which connects with the waste or discharge pipe throughthe starting-valve 29, and the two-way valve 49 being in its normalposition, as illustrated in Fig. 3, the water under pressure Howsthrough the pipe 50 into the forward or right-hand end of the ram 2H,thus moving its piston to the left and cansing the roller 44 to ride outof the notch 47 in the register or controller bar 46, and thus to openthe stopping-valve 3l, so that the water may now escape from the rearend of the ram 2S through the Waste-pipe 32 until the stopping-valve 3lis again closed, which is automatically done the moment the bar 46 ismoved far enough to permit the roller 44 to drop into the next notch, asthe controllerbar 4G only holds the stopping-valve 3l open for the spacebetween the notches. The moment the stopping-valve is thus closed thefeed-screw ram 2S can give no further movement to the rack 26, becausethe water cannot escape from the rear end ot' the cylinder, thestarting-valve 29 having been previously closed, as before stated. Whenit is desired to turn up the feed-Screws by withdrawing the rack 26 tothe right to its lirst position, this is done by swinging the levers 5354 into the reverse position from that indicated in Fig. 3, thus causingthe water under pressure to feed into the left-hand end of the rain 28through the pipe 52 and flow out from the right-hand end thereof throughthe pipe 50, which the two-way valve 49 now connects with the dischargeor waste and disconnects fromthe Water feed or supply pipe leading fromthe accumulator' or hydraulic pum p or other source of liquid underpressure. If the operator wishes to turn the rolls down several or allof the notches of the register or controlling bar 46 at once or by onecontinuons movement to the left, this he may do by simply lifting theweight or holding up the lever of the starting-valve 3l, thus keepingthe relief or IIO discharge through the starting-valve open until thefeed-screws are turned down to the extent desired.

I claiml. In a reversing rolling-mill, the combination withreversing-rolls, friction-clutches for reversing the rolls, a hydraulicram for operating said clutches, a reversing valve and valve-lever forsaid ram, feed-screws for setting the rolls closer together, a rack andgears for turning the feed-screws, a feed-screw ram for actuating therack, a notched bar for regulating the movement of the feed-screw-rampiston, a stopping-valve for said feed-screw ram, and a starting-valvefor said feed-screw ram, and means connecting said valve with saidreversing valve-lever, substantially as specified.

2. In a reversing rolling-mill, the combination with reversing-rolls, ahydraulic ram for reversing the rolls, a reversing valve and valve-leverfor said ram, feed-screws, rack and gears, a feed-screw ram and astartingvalve for said ram, and connecting mechanism for operating saidstarting-valve from the reversing valve-lever, substantially asspecified.

3. In a reversing rolling-mill, the combination with reversing-rolls, ahydraulic ram for reversing the rolls, a reversing valve and valve-leverfor said ram, feed-screws, rack and gears, a feed-screw ram and astartingvalve for said rain, connecting mechanism for operating saidstarting-valve from the reversing valve-lever, a stopping-valve for saidfeed-screw ram, and means for automatically operating saidstopping-valve when the mill is reversed, substantially as specified.

1l. In a reversing rolling-mill, the combination with reversing-rolls, ahydraulic ram for reversing the rolls, a reversing valve and valve-leverfor said ram, feed-screws, rack and gears, a feed-screw ram and astartingvalve for said ram, connecting mechanism for operating saidstarting-valve from the reversing valve-lever, a stopping-valve and anotched register or regulating bar for automatically operating thestopping-valve, substantially as specified.

5. In a reversing rolling-mill, the combination with reversing-rolls, ahydraulic ram for reversing the rolls, a reversing valve and valve-leverfor said ram, feed-screws, rack and gears, a feed-screw ram and astartingvalve for said ram, connecting mechanism for operating saidstarting-valve from the reversing valvelever, a stoppingvalve, a notchedregister or regulating bar for automatically operating thestopping-valve, and independent valves for said feed-screw ram enablingits piston to be returned to position at one movement, substantially asspecified.

6. The combination with reversing-rolls, of a hydraulic ram forreversing the same, a valve and Valve-lever for said ram, feedscrews,rack and gears, a feed-screw ram, a

starting-valve for said ram, a movable cani or bar for momentarilyopening said valve, a low-pressure cylinder and piston for operatingsaid cam or bar, a valve for said low-pressure cylinder, and meansconnecting said lowpressnre-cylinder valve with said reversingvalve-lever, substantially as specified.

7. The combination with reversing-rolls, of a hydraulic ram, valve andvalve-lever for reversing said rolls, feed-screws, a feed-screw ram anda valve for peratingthe same connected With the reversing valve-lever,substantially as specified.

8. The combination with reversing-rolls, of a hydraulic ram, valve andvalve-lever for reversing the rolls, feed-screws, a feed-screw ram and avalve for operating the same connected with the reversing valve-lever, astopping-valve for the feed-screw ram and a notched bar forautomatically operating the same, substantially as specified.

9. The combination with reversing-rolls, of a hydraulic ram, valve andvalve-lever for reversing the rolls, feed-screws, a feed-screw ram and avalve for operating the same connected with the reversing valve-lever, astopping-valve for the feedscrew ram, a notched bar for automaticallyoperating the same, and independently-operated valves to permit thepiston and the feed-screw ram to be returned to position at onemovement, substantially as specified.

lO. The combination With reversing-rolls, of a hydraulic ram and valvefor reversing said rolls, feed-screws, a feed-screw ram, astarting-Valve therefor, and connecting mechanism between saidstarting-valve and the reversing-valve, substantially as specified.

Il. The combination with reversing-rolls,

of a hydraulic ram and valve f'or reversing said rolls, feed-screws, afeed-screw ram, a starting-valve therefor, connecting mechanism betvveensaid starting-valve and the reversingvalve, said connecting mechanismcomprising a cam and lever to cause said starting-valve to be onlymomentarily open ed, substantially as specified.

12. The combination with reversing-rolls, of a hydraulic ram and valvefor reversing said rolls, feed-screws, a feed-screw ram, astarting-valve therefor, connecting mechanism between saidstarting-valve and the reversingvalve, said connecting mechanismcomprising a cam and lever to cause said starting-valve to vbe onlymomentarily opened, and a low-pressure cylinder and piston for operatingsaid cani, substantially as specified.

I3. The combination with reversing-rolls, of a hydraulic ram and valvefor reversing said rolls, feed-screws, a feed-screw ram, astarting-valve connected With and operated by the movement ot' thereversing-valve, and a stopping-valve, and means for automaticallyoperating the stopping-valve to stop the feed-screw ram as required,substantially as specified.

IOO

IIO

able connection between said low-pressure Valve-lever and saidreversing` Valve-lever, substantially as specified. A v

JOHN G. HODGSON.

14. The combination with reversing-rolls, of a hydraulic mm, Valve andValve-lever for reversing said rolls, feed-screws, a rack and I gearsfor operating; the same, a feed-screwI l l l Vtnesses:

EDMUND ADooCK, H. M. MUNDAY.

5 ram, a starting-Valve, valve-lever, sliding cam-bar, low-pressurecylinder and piston, a valve and valve-lever therefor, and a, detach-

